CN111614337A - Main capacitor tower and AC/DC filter - Google Patents
Main capacitor tower and AC/DC filter Download PDFInfo
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- CN111614337A CN111614337A CN202010488702.4A CN202010488702A CN111614337A CN 111614337 A CN111614337 A CN 111614337A CN 202010488702 A CN202010488702 A CN 202010488702A CN 111614337 A CN111614337 A CN 111614337A
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- capacitor
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/01—Frequency selective two-port networks
- H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
Abstract
The invention provides a main capacitor tower and an alternating current-direct current filter, wherein the main capacitor tower comprises a plurality of main capacitors, the main capacitors are arranged on a tower layer of the main capacitor tower, and the difference value of potential points of any two main capacitors in the same tower layer is smaller than a first preset difference value; the main capacitor is composed of a plurality of capacitor units in series and/or parallel connection. The main capacitor tower carries out a tower sharing design on a plurality of main capacitors, so that the floor area of the main capacitors can be reduced; in addition, the main capacitor with the potential point difference smaller than the first preset difference is arranged on the same tower layer by the main capacitor tower, so that the point positions of the main capacitors arranged or arranged on the same tower layer are relatively close to each other, the potential difference between the two capacitor units is ensured to be minimum, the distance between the capacitor units is reduced, the whole main capacitor tower is enabled to be closer, the whole volume is reduced, and the occupied area is further reduced.
Description
Technical Field
The invention relates to the technical field of filters, in particular to a main capacitor tower and an alternating current-direct current filter.
Background
An AC/DC filter is a passive filter composed of series-parallel connection of capacitors and inductors, and is often used in high-voltage DC or AC power transmission systems. Common ac/dc filters include triple-tuned dc filters and double-tuned dc filters, however, in practical applications, a group of filters is difficult to achieve the filtering purpose, and often a plurality of groups of filters need to be configured to achieve the filtering effect. The existing alternating current-direct current filters are configured by taking groups as units, and each group of filters needs to be configured with a circuit breaker, an isolating switch and the like, so that the occupied space is large. The main capacitor tower is an important device in the filter, and the main capacitor tower is usually designed according to groups at present and occupies a large area.
Disclosure of Invention
In view of this, the present invention provides a main capacitor tower and an ac/dc filter, which are used to solve the problem of large occupied areas of the main capacitor tower and the ac/dc filter.
A main capacitor tower comprises a plurality of main capacitors, wherein the main capacitors are arranged on tower layers of the main capacitor tower, and the difference value of potential points of any two main capacitors in the same tower layer is smaller than a first preset difference value; the main capacitor is formed by connecting a plurality of capacitor units in series and/or in parallel.
Further, the air conditioner is provided with a fan,
the potential points of the main capacitors in the same tower layer are the same.
Further, the air conditioner is provided with a fan,
the main capacitors in each tower layer are arranged in order of increasing potential points from the edge to the middle.
Further, the air conditioner is provided with a fan,
the main capacitors in each tower layer are arranged in order of decreasing potential points from the edge to the middle.
Further, the air conditioner is provided with a fan,
each main capacitor comprises a plurality of capacitor layers, the capacitor units are arranged on the capacitor layers, and a plurality of capacitor units are arranged on each capacitor layer.
Further, the air conditioner is provided with a fan,
the difference between the numbers of the capacitor units in any two of the main capacitors is smaller than a second preset difference.
Further, the air conditioner is provided with a fan,
the number of the capacitor units in any two of the main capacitors is equal.
Further, the air conditioner is provided with a fan,
the number of capacitive layers of the main capacitor, the number of capacitor units in each capacitive layer is determined by the weight of the capacitor units and the total number of capacitor units.
Further, the air conditioner is provided with a fan,
each capacitor unit is arranged at intervals, and the interval distance is determined according to the potential difference between the capacitor units.
The main capacitor tower comprises a plurality of main capacitors, the main capacitors are arranged on a tower layer of the main capacitor tower, and the difference value of potential points of any two main capacitors in the same tower layer is smaller than a first preset difference value; the main capacitor is composed of a plurality of capacitor units in series and/or parallel connection. The main capacitor tower carries out a tower sharing design on a plurality of main capacitors, so that the floor area of the main capacitors can be reduced; in addition, the main capacitor with the potential point difference smaller than the first preset difference is arranged on the same tower layer by the main capacitor tower, so that the point positions of the main capacitors arranged or arranged on the same tower layer are relatively close to each other, the potential difference between the two capacitor units is ensured to be minimum, the distance between the capacitor units is reduced, the whole main capacitor tower is enabled to be closer, the whole volume is reduced, and the occupied area is further reduced.
According to the main capacitor tower, the embodiment of the invention also provides an alternating current-direct current filter.
An AC/DC filter comprises a main capacitor tower, a plurality of filter banks, a current sensor, a disconnecting switch and a circuit breaker; the number of the main capacitors in the main capacitor tower is the same as that of the filter banks, the number of the current sensors is two, and the number of the isolating switches is two; a plurality of one end of the filter bank is respectively connected with a first current sensor, the other end of the filter bank is respectively connected with a plurality of main capacitors in the main capacitor tower in a one-to-one correspondence manner, the main capacitors are respectively connected with a second current sensor, and the second current sensor is connected with a second isolating switch through a first isolating switch and a circuit breaker in sequence.
The alternating current-direct current filter adopts the main capacitor tower, so that the alternating current-direct current filter adopts a common-tower design of a plurality of main capacitors by the main capacitor tower, and the floor area of the main capacitors can be reduced; in addition, the main capacitor with the potential point difference smaller than the first preset difference is arranged on the same tower layer by the main capacitor tower, so that the point positions of the main capacitors arranged or arranged on the same tower layer are relatively close to each other, the potential difference between the two capacitor units is ensured to be minimum, the distance between the capacitor units is reduced, the whole main capacitor tower is enabled to be closer, the whole volume is reduced, and the occupied area is further reduced. In addition, this alternating current-direct current filter is nearly set up a current sensor, isolator and circuit breaker, and a plurality of filter banks share a current sensor, isolator and circuit breaker promptly, save equipment on the one hand, and on the other hand has reduced the volume to area has been reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a main capacitor tower according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a main capacitor tower according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an ac/dc filter according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to explain the present invention in more detail, a main capacitor tower and an ac/dc filter according to the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a main capacitor tower comprises a plurality of main capacitors 20, the plurality of main capacitors 20 are arranged on a tower layer 10 of the main capacitor tower, wherein the difference of potential points of any two main capacitors 20 in the same tower layer 10 is smaller than a first preset difference; the main capacitor 20 is composed of a plurality of capacitor cells 30 connected in series and/or in parallel.
Specifically, the capacitor tower generally includes a bottom post insulator, an interlayer post insulator, a pneumatic switch, a capacitor, a grading ring, etc., wherein the bottom post insulator, the interlayer post insulator in combination divide the capacitor tower into a plurality of tower layers, wherein the tower layers can be used to arrange the capacitor, the pneumatic switch, the grading ring, etc.
In the present embodiment, as shown in fig. 1, the main capacitor tower includes a plurality of tower layers 10, wherein the tower layers 10 are used for installing the main capacitors 20, a plurality of main capacitors 20 may be disposed in one tower layer 10, and the difference between the potential points of any two main capacitors 20 in the same tower layer is smaller than a first preset difference, so that it is ensured that the potential points of the main capacitors 20 in the same tower layer are close to or slightly different. Since the main capacitor 20 is composed of the capacitor units 30, and there is a voltage on the capacitor units 30, there is a potential difference between the two capacitor units 30, and the larger the potential difference is, a larger distance is required to ensure no flashover (i.e. the distance between the two capacitor units 30 is larger); when the main capacitors 20 with close potential points are arranged in the same tower layer, the potential difference between the two capacitor units 30 can be ensured to be small, so that the distance between the capacitor units 30 is reduced, and the whole volume is reduced.
The first preset difference value is a preset value which cannot be too large, and when the value is too large, the difference of potential points of the main capacitors 20 in the same tower layer is large, so that the volume of the main capacitor tower is too large; this value cannot be too small, and when it is too small, the number of main capacitors 20 provided in the same tower layer is reduced, and when it is large, more tower layers are required to be placed, which also increases the volume of the main capacitor tower. Wherein the first preset difference value may be determined as an appropriate value according to the number of main capacitors, the number of capacitor units, and the volume of the main capacitor tower.
The main capacitors 20 may be identical or different in structure. In the present embodiment, the main capacitor 20 is adopted to ensure that the structure is similar or relatively close to each other as much as possible, and the closer the structure is, the more compact the designed common-tower main capacitor structure (i.e. the main capacitor tower) is, the smaller the overall volume thereof is.
The capacitor unit 30 is a device composed of capacitors and/or reactances connected in series and/or in parallel.
The main capacitor tower comprises a plurality of main capacitors, the main capacitors are arranged on a tower layer of the main capacitor tower, and the difference value of potential points of any two main capacitors in the same tower layer is smaller than a first preset difference value; the main capacitor is composed of a plurality of capacitor units in series and/or parallel connection. The main capacitor tower carries out a tower sharing design on a plurality of main capacitors, so that the floor area of the main capacitors can be reduced; in addition, the main capacitor with the potential point difference smaller than the first preset difference is arranged on the same tower layer of the main capacitor tower, so that the point positions of the main capacitors arranged or arranged on the same tower layer are relatively close to each other, the potential difference between the two capacitor units is ensured to be minimum, the distance between the capacitor units is reduced, the whole main capacitor tower is further enabled to be closer to reduce the whole volume, and the occupied area is reduced in one embodiment.
In one embodiment, the potential points of the main capacitors in the same tower layer are the same.
Alternatively, main capacitors having the same potential point are disposed in the same tower layer, so that it is possible to ensure that the potential difference between the two capacitor units 30 is minimized, thereby minimizing the space between the capacitor units 30 and reducing the overall volume.
In one embodiment, as shown in fig. 2, each main capacitor (main capacitor a and main capacitor B) includes a plurality of capacitor layers 40, and the capacitor units 30 are disposed on the capacitor layers 40, wherein a number of capacitor units 30 are disposed on each capacitor layer 40.
Wherein each main capacitor comprises a plurality of capacitor units 30, each capacitor unit 30 is also arranged in layers, i.e. the main capacitor 20 comprises a plurality of layers (in the present embodiment referred to as capacitor layers 40), each for mounting a capacitor unit 30. The capacitor layer 40 is actually a sub-tower layer of the main capacitor tower (i.e. each tower layer of the main capacitor tower is divided to form a plurality of sub-tower layers, wherein the sub-tower layers are also composed of bottom post insulators and interlayer post insulators). The capacitor layers 40 are mainly used for arranging the capacitor units 30, and the number of the capacitor units 30 that can be provided by each capacitor layer 40 is variable and is mainly determined according to the size of the main capacitor tower and the size of the capacitor units 30.
In one embodiment, the difference in the number of capacitor units in any two main capacitors is less than a second preset difference.
The second preset difference is a preset value which cannot be too large, and when the second preset difference is too large, the difference in the number of capacitor units included in the main capacitors 20 in the same tower layer is large, and the structure of the main capacitors 20 in the same tower layer is large, which may result in a large difference in potential points of the main capacitors 20, and the large difference in potential points may result in an increase in the pitch of the capacitor units 40, which may result in an excessively large volume of the main capacitor tower. Wherein the second predetermined difference value may be determined to be an appropriate value according to parameters such as the capacitance value of the main capacitor, and the number of capacitor cells of the main capacitor.
In one embodiment, the number of capacitor units in any two main capacitors is equal.
Specifically, when the number of the capacitor units in the two main capacitors is equal, the two main capacitors can be guaranteed to have the same structure, the same structure and the same arrangement mode can be guaranteed, the common-tower structure of the two main capacitors can be more compact, and therefore the overall volume of the generated main capacitor tower can be reduced, and the occupied area is reduced.
In one embodiment, the main capacitors in each tower layer are arranged in order of increasing potential points from edge to middle.
In one embodiment, the main capacitors in each tower layer are arranged in order of decreasing potential points from edge to middle.
Specifically, the main capacitor is mainly composed of capacitor units, wherein each capacitor unit is disposed on the capacitor layer 40 (i.e., the sub-tower layer), and each capacitor unit has a required voltage to ground, that is:
n denotes the total number of certain main capacitors therein, UNRepresents the total voltage of one of the main capacitors, m represents the serial number of one of the main capacitors, and has the value of m ∈ [ (k-1) Q +1, kQ]Where k is the number of layers of the capacitor layer, the capacitor units are arranged in a manner of gradually increasing or gradually decreasing from the edge to the intermediate potential, respectively, at the intermediate position, the units of different capacitors are close, and the potential difference between different capacitor units is calculated as follows, when the potential is arranged from low to high:
when the electric potential is arranged from high to high
From the above analysis, in order to reduce the potential difference between the capacitor units, the main capacitors may be sequentially arranged in a decreasing order from the potential point to the middle or sequentially arranged in an increasing order from the potential point to the middle, so that the distance between the capacitor units may be reduced, and finally, the entire volume of the main capacitor tower may be reduced. In addition, based on the above calculationWhen the main capacitors are arranged from high to first from the edge to the middle in accordance with the potential points, the potential difference between the capacitor units can be minimized.
In one embodiment, the number of capacitive layers of the main capacitor, the number of capacitor units in each capacitive layer is determined by the weight of the capacitor units and the total number of capacitor units.
Specifically, the number K of capacitor layers of the main capacitor and the number L of capacitor units in each capacitor layer may be determined according to the weight of the capacitor units and the total number of capacitor units. When the weight of the capacitor unit is heavy and the total number of the capacitor unit is large, the number K of the required capacitor layers and the number L of the capacitor units in each capacitor layer are large, and the number of the capacitor units in the positive direction is small. The values of K and L are very critical, and the values can influence the volume of the main capacitor tower.
In one embodiment, each capacitor unit is arranged at intervals, and the interval distance is determined according to the potential difference between the capacitor units.
And each capacitor unit is arranged at intervals, and the distance between the two capacitor units can be calculated according to the requirement of the potential difference between the capacitor units. The spacing distance can affect the size of the main capacitor tower, so a suitable distance is selected.
According to the main capacitor tower, the embodiment of the invention also provides an alternating current-direct current filter.
An ac/dc filter, as shown in fig. 3, includes a main capacitor tower 100, a plurality of filter banks 200, a current sensor 300, a disconnecting switch 400, and a circuit breaker 500 provided in an embodiment of the present invention; the number of the main capacitors in the main capacitor tower is the same as that of the filter banks, the number of the current sensors 300 is two, and the number of the isolating switches is two; one end of each of the plurality of filter banks 200 is connected to the first current sensor, the other end of each of the filter banks is connected to the plurality of main capacitors in the main capacitor tower in a one-to-one correspondence manner, the plurality of main capacitors are connected to the second current sensor 300, and the second current sensor 300 is connected to the second isolating switch 400 sequentially through the first isolating switch 400 and the circuit breaker 500.
The filter bank 200 is formed by connecting components such as capacitors and reactors in series and/or in parallel, and the specific composition mode of the filter bank is determined according to the filtering capability or requirement (usually, the fixed value of the filter) of the filter and the resistance values of the components such as the capacitors and the reactors.
The alternating current-direct current filter adopts the main capacitor tower, so that the alternating current-direct current filter adopts a common-tower design of a plurality of main capacitors by the main capacitor tower, and the floor area of the main capacitors can be reduced; in addition, the main capacitor with the potential point difference smaller than the first preset difference is arranged on the same tower layer of the main capacitor tower, so that the point positions of the main capacitors arranged or arranged on the same tower layer are relatively close to each other, the potential difference between the two capacitor units is ensured to be minimum, the distance between the capacitor units is reduced, the whole main capacitor tower is further enabled to be closer to reduce the whole volume, and the occupied area is reduced in one embodiment. In addition, this alternating current-direct current filter is nearly set up a current sensor, isolator and circuit breaker, and a plurality of filter banks share a current sensor, isolator and circuit breaker promptly, save equipment on the one hand, and on the other hand has reduced the volume to area has been reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A main capacitor tower comprising a plurality of main capacitors disposed on a tower level of said main capacitor tower, wherein a difference in potential points between any two main capacitors in the same tower level is less than a first predetermined difference; the main capacitor is formed by connecting a plurality of capacitor units in series and/or in parallel.
2. A main capacitor tower according to claim 1, wherein the potential points of said main capacitors in the same tower layer are the same.
3. A main capacitor tower according to claim 1, wherein said main capacitors in each tower layer are arranged in order of increasing potential points in order from edge to middle.
4. A main capacitor tower according to claim 1, wherein said main capacitors in each tower layer are arranged in order of decreasing potential points in order from edge to middle.
5. A main capacitor tower according to any one of claims 1-4, wherein each of said main capacitors comprises a plurality of capacitor layers, said capacitor units being arranged on said capacitor layers, wherein a number of said capacitor units are arranged on each of said capacitor layers.
6. The main capacitor tower of claim 5, wherein the difference in the number of capacitor units in any two of the main capacitors is less than a second predetermined difference.
7. The main capacitor tower of claim 6, wherein the number of capacitor units in any two of the main capacitors is equal.
8. The main capacitor tower of claim 6 or 7, wherein the number of capacitor layers of the main capacitor, the number of capacitor units in each capacitor layer is determined by the weight of the capacitor units and the total number of capacitor units.
9. A main capacitor tower according to claim 6 or 7, wherein each capacitor unit is arranged at intervals, and the interval distance is determined according to the potential difference between the capacitor units.
10. A filter for ac and dc comprising a main capacitor tower according to any one of claims 1 to 9, a plurality of filter banks, a current sensor, a disconnector and a circuit breaker; the number of the main capacitors in the main capacitor tower is the same as that of the filter banks, the number of the current sensors is two, and the number of the isolating switches is two; a plurality of one end of the filter bank is respectively connected with a first current sensor, the other end of the filter bank is respectively connected with a plurality of main capacitors in the main capacitor tower in a one-to-one correspondence manner, the main capacitors are respectively connected with a second current sensor, and the second current sensor is connected with a second isolating switch through a first isolating switch and a circuit breaker in sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010488702.4A CN111614337A (en) | 2020-06-02 | 2020-06-02 | Main capacitor tower and AC/DC filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010488702.4A CN111614337A (en) | 2020-06-02 | 2020-06-02 | Main capacitor tower and AC/DC filter |
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| CN111614337A true CN111614337A (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010488702.4A Pending CN111614337A (en) | 2020-06-02 | 2020-06-02 | Main capacitor tower and AC/DC filter |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5668418A (en) * | 1994-10-25 | 1997-09-16 | Asea Brown Boveri Ab | Three-phase filter equipment including standby filter branch for switchably replacing a removed filter branch for a particular phase |
| US20030142457A1 (en) * | 2000-01-14 | 2003-07-31 | Esbjorn Eriksson | Power capacitor |
| CN102130456A (en) * | 2010-11-05 | 2011-07-20 | 国网南自控股（杭州）有限公司 | Complete set of device for 110kV filter compensation |
| CN202856374U (en) * | 2012-10-09 | 2013-04-03 | 上海思源电力电容器有限公司 | Novel capacitor tower for alternating-current filtering or parallel compensation |
| US20150092459A1 (en) * | 2012-06-01 | 2015-04-02 | Abb Technology Ltd | Filter apparatus, a method for filtering harmonics in an electrical power transmission or distribution system, and such a system |
| CN205751863U (en) * | 2016-07-06 | 2016-11-30 | 桂林电力电容器有限责任公司 | A kind of hierarchical antidetonation power capacitor apparatus |
-
2020
- 2020-06-02 CN CN202010488702.4A patent/CN111614337A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5668418A (en) * | 1994-10-25 | 1997-09-16 | Asea Brown Boveri Ab | Three-phase filter equipment including standby filter branch for switchably replacing a removed filter branch for a particular phase |
| US20030142457A1 (en) * | 2000-01-14 | 2003-07-31 | Esbjorn Eriksson | Power capacitor |
| CN102130456A (en) * | 2010-11-05 | 2011-07-20 | 国网南自控股（杭州）有限公司 | Complete set of device for 110kV filter compensation |
| US20150092459A1 (en) * | 2012-06-01 | 2015-04-02 | Abb Technology Ltd | Filter apparatus, a method for filtering harmonics in an electrical power transmission or distribution system, and such a system |
| CN202856374U (en) * | 2012-10-09 | 2013-04-03 | 上海思源电力电容器有限公司 | Novel capacitor tower for alternating-current filtering or parallel compensation |
| CN205751863U (en) * | 2016-07-06 | 2016-11-30 | 桂林电力电容器有限责任公司 | A kind of hierarchical antidetonation power capacitor apparatus |
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